diff options
| -rw-r--r-- | fpu/softfloat-specialize.c.inc | 38 | ||||
| -rw-r--r-- | include/fpu/softfloat.h | 48 |
2 files changed, 86 insertions, 0 deletions
diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc index dc4ea33..c2f87ad 100644 --- a/fpu/softfloat-specialize.c.inc +++ b/fpu/softfloat-specialize.c.inc @@ -266,6 +266,25 @@ bool float16_is_quiet_nan(float16 a_, float_status *status) } /*---------------------------------------------------------------------------- +| Returns 1 if the bfloat16 value `a' is a quiet +| NaN; otherwise returns 0. +*----------------------------------------------------------------------------*/ + +bool bfloat16_is_quiet_nan(bfloat16 a_, float_status *status) +{ + if (no_signaling_nans(status)) { + return bfloat16_is_any_nan(a_); + } else { + uint16_t a = a_; + if (snan_bit_is_one(status)) { + return (((a >> 6) & 0x1FF) == 0x1FE) && (a & 0x3F); + } else { + return ((a >> 6) & 0x1FF) == 0x1FF; + } + } +} + +/*---------------------------------------------------------------------------- | Returns 1 if the half-precision floating-point value `a' is a signaling | NaN; otherwise returns 0. *----------------------------------------------------------------------------*/ @@ -285,6 +304,25 @@ bool float16_is_signaling_nan(float16 a_, float_status *status) } /*---------------------------------------------------------------------------- +| Returns 1 if the bfloat16 value `a' is a signaling +| NaN; otherwise returns 0. +*----------------------------------------------------------------------------*/ + +bool bfloat16_is_signaling_nan(bfloat16 a_, float_status *status) +{ + if (no_signaling_nans(status)) { + return 0; + } else { + uint16_t a = a_; + if (snan_bit_is_one(status)) { + return ((a >> 6) & 0x1FF) == 0x1FF; + } else { + return (((a >> 6) & 0x1FF) == 0x1FE) && (a & 0x3F); + } + } +} + +/*---------------------------------------------------------------------------- | Returns 1 if the single-precision floating-point value `a' is a quiet | NaN; otherwise returns 0. *----------------------------------------------------------------------------*/ diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index 95f0789..1233f98 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -423,9 +423,57 @@ bfloat16 bfloat16_sqrt(bfloat16, float_status *status); FloatRelation bfloat16_compare(bfloat16, bfloat16, float_status *status); FloatRelation bfloat16_compare_quiet(bfloat16, bfloat16, float_status *status); +bool bfloat16_is_quiet_nan(bfloat16, float_status *status); +bool bfloat16_is_signaling_nan(bfloat16, float_status *status); bfloat16 bfloat16_silence_nan(bfloat16, float_status *status); bfloat16 bfloat16_default_nan(float_status *status); +static inline bool bfloat16_is_any_nan(bfloat16 a) +{ + return ((a & ~0x8000) > 0x7F80); +} + +static inline bool bfloat16_is_neg(bfloat16 a) +{ + return a >> 15; +} + +static inline bool bfloat16_is_infinity(bfloat16 a) +{ + return (a & 0x7fff) == 0x7F80; +} + +static inline bool bfloat16_is_zero(bfloat16 a) +{ + return (a & 0x7fff) == 0; +} + +static inline bool bfloat16_is_zero_or_denormal(bfloat16 a) +{ + return (a & 0x7F80) == 0; +} + +static inline bool bfloat16_is_normal(bfloat16 a) +{ + return (((a >> 7) + 1) & 0xff) >= 2; +} + +static inline bfloat16 bfloat16_abs(bfloat16 a) +{ + /* Note that abs does *not* handle NaN specially, nor does + * it flush denormal inputs to zero. + */ + return a & 0x7fff; +} + +static inline bfloat16 bfloat16_chs(bfloat16 a) +{ + /* Note that chs does *not* handle NaN specially, nor does + * it flush denormal inputs to zero. + */ + return a ^ 0x8000; +} + static inline bfloat16 bfloat16_set_sign(bfloat16 a, int sign) { return (a & 0x7fff) | (sign << 15); |